Daniel Suarez claimed the fastest speed in the first of two Xfinity Series practice sessions at Iowa Speedway.
Suaraz recorded a top speed of 133.367 mph around the 0.875-mile track.
The Joe Gibbs Racing driver was followed by Brandon Jones (131.965), Ben Rhodes (131.744), Ty Dillon (131.546) and Darrell Wallace Jr. (131.486).
At the first Iowa race this year Suarez started second and led 48 laps, but finished 18th.
The second Iowa practice session starts at 7 pm ET on NBCSN.